Maxim Integrated / Mbed 2 deprecated DeepCover Embedded Security in IoT

MAXREFDES143#: DeepCover Embedded Security in IoT Authenticated Sensing & Notification

Dependencies:   MaximInterface mbed

The MAXREFDES143# is an Internet of Things (IoT) embedded security reference design, built to protect an industrial sensing node by means of authentication and notification to a web server. The hardware includes a peripheral module representing a protected sensor node monitoring operating temperature and remaining life of a filter (simulated through ambient light sensing) and an mbed shield representing a controller node responsible for monitoring one or more sensor nodes. The design is hierarchical with each controller node communicating data from connected sensor nodes to a web server that maintains a centralized log and dispatches notifications as necessary. The mbed shield contains a Wi-Fi module, a DS2465 coprocessor with 1-Wire® master function, an LCD, LEDs, and pushbuttons. The protected sensor node contains a DS28E15 authenticator, a DS7505 temperature sensor, and a MAX44009 light sensor. The mbed shield communicates to a web server by the onboard Wi-Fi module and to the protected sensor node with I2C and 1-Wire. The MAXREFDES143# is equipped with a standard shield connector for immediate testing using an mbed board such as the MAX32600MBED#. The simplicity of this design enables rapid integration into any star-topology IoT network requiring the heightened security with low overhead provided by the SHA-256 symmetric-key algorithm.

More information about the MAXREFDES143# is available on the Maxim Integrated website.

--- a/Factory.cpp	Thu Apr 14 19:48:01 2016 +0000
+++ b/Factory.cpp	Tue Apr 19 10:08:27 2016 -0500
@@ -139,13 +139,13 @@
   {
     DS28E15_22_25::Segment blankSegment;
     std::memset(blankSegment, SensorNode::defaultPaddingByte, blankSegment.length);
-    for (std::size_t i = 0; i < (DS28E15_22_25::Page::length / DS28E15_22_25::Segment::length); i++)
+    for (std::size_t i = 0; i < DS28E15_22_25::segmentsPerPage; i++)
     {
       result = (sensorNode.ds2465.OWSkipROM() == OneWireMaster::Success);
       if (result)
         result = (sensorNode.ds28e15_22_25.writeAuthSegment(sensorNode.ds2465, sensorNode.authData.pageNum, i,
                                                             ((i == sensorNode.authData.segmentNum) ? sensorNode.authData.segment : blankSegment),
-                                                            reinterpret_cast<const DS28E15_22_25::Segment::Buffer &>(static_cast<const DS28E15_22_25::Page::Buffer &>(pageData)[i * sizeof(DS28E15_22_25::Segment::Buffer)]), false) == OneWireSlave::Success);
+                                                            pageData.toSegment(i), false) == OneWireSlave::Success);
       
       if (!result)
         break;